Worswick, Jacqueline. "Frances and Helen." A House Called Helen: The Development of Hospice Care for Children. : Oxford University Press, 2000-11-30. Oxford Scholarship Online. 2011-11-17. Date Accessed 19 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780192632357.001.0001/acprof-9780192632357-chapter-4>.
Worswick, J.(2000-11-30). Frances and Helen. In A House Called Helen: The Development of Hospice Care for Children. : Oxford University Press. Retrieved 19 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780192632357.001.0001/acprof-9780192632357-chapter-4.
Worswick, Jacqueline. "Frances and Helen." In A House Called Helen: The Development of Hospice Care for Children. : Oxford University Press, 2000-11-30. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780192632357.001.0001/acprof-9780192632357-chapter-4.
Worswick J. Frances and Helen. In: Worswick J. A House Called Helen: The Development of Hospice Care for Children. Oxford University Press; 2000. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780192632357.001.0001/acprof-9780192632357-chapter-4. Accessed June 19, 2013.